July 2019 – Page 63 – CNC Machining & Turning, Milling, Metal parts

What are the new structures of the taps?

In order to improve the cutting efficiency of the tap, improve the chip and chip removal situation, reduce the tooth breakage and break, the modern tap has many new structures. (1) screw tip tap: cutting part is worn with chute to form negative edge inclination (see cutting tool). Chip cutting forward is suitable for taper taper hole.
The spiral groove taps: the chip tank is spiral. In processing the right screw thread of the blind hole, the taps should make the right spiral chipping slot to make the chip discharge forward without scratching the thread.
Troughless extrusion Taps: the plastic deformation of metal is formed by the extrusion of the wall of the extruded hole, which is mainly used to process plastic materials such as aluminum alloy and copper, and also for processing low carbon steel and stainless steel. The cone end of the head of the taper is a conical thread. In order to reduce friction and reduce extrusion pressure, the taps section is made polygonal. The extruded tap has high strength and is especially suitable for machining small size holes with diameters below 6 mm.
(4) taps: grinding one tooth along the direction of the spiral line of the knife teeth, thus increasing the chip thickness, which is beneficial to cutting and removing chips, for the processing of stainless steel and other parts.
Content chip tap: chip is discharged from the inner hole of tap and used for machining large size screw holes.
Automatic shrinkage taps: after tapping, the tap teeth can automatically shrink in order to exit quickly.
Broaching tap: a broach with teeth distributed on the helix, commonly used for machining trapezoidal and square tooth threads.
Tungsten carbide tap: mainly used for processing cast iron and non-ferrous metals, cutting efficiency and tool life are higher.

Maintenance and maintenance of metal stamping die

Failure and maintenance of 1. punch
Punch is the most frequently maintained part, and its main fault is breaking. The main reasons are: the length of the punch is too long, the gap between the convex and concave die is not uniform, the unloading plate is not stable during the stamping process, the gap between the punch plate, the discharge plate and the punch is too large, and the waste die waste is excluded from the unblocked.
Therefore, the punch length is generally not more than 35mm to ensure that it has sufficient rigidity; the die and discharge plate should be guided by four small guide columns fixed on the fixed plate of the punch to ensure that the clearance of the convex and concave die is uniform and a number of small punch guides. The unloading screw on the discharge plate is used as an equal height sleeve to ensure that it is punched. In order to ensure the smooth removal of the punching waste, the cutting edge should be lapping regularly to ensure the sharpness.

Failure and maintenance of 2. die
Because the material is soft and the thickness is about 11mm, it is almost close to the no gap mold. In order to ensure the die gap and the quality of the punching hole, the die materials choose 45# steel without heat treatment. In addition, hollowing out of the effective cutting edge of the concave die will result in excessive wear and collapse of the cutting edge of the die. Therefore, the concave die should be designed as a mosaic structure, and more spare parts should be prepared to facilitate the timely replacement.

Maintenance of gap between 3. punch and die
The wear of convex and concave die, especially the wear of the die, increases the gap of the die, causes the edge of the hole to be hairy, the size becomes larger, and the small copper hammer should be used in time to gently strike the rim of the die inlaid with the die without heat treatment. The shape of the die is smaller by the plastic deformation of the die, and the surface of the die is then on the grinding machine. Remove the 11mm on the top, close the upper and lower die, and run the empty stroke 5-10 times until the edge of the punched hole has no edge.
The clearance between the small punch and the discharge plate should be checked regularly to ensure that it is less than the clearance of the mold and to add the lubricant in time. If the gap is too large, the insert on the discharge plate should be replaced in time. The guide column is the key part to ensure the uniform gap between the die and the die. It should not only guide the discharging plate, but also guide the die. Only in this way can the clearance of the die be uniform and reasonable.

Maintenance of 4. positive nailing
The location of pins and pads on flexible circuit boards is ensured by the location of locating holes, which are pre processed on CNC drilling machines. The position and quantity of the guide pin on the die are not fixed. Due to the different environmental temperature and material, the flexible PCB will produce unequal shrinkage, which leads to the deviation of the hole position. Therefore, attention should be paid to adjusting the position and relative quantity of the guide pin to ensure the quality of the product.

5. punching waste jumps and Solutions
Because of the electrostatic action of flexible materials, the punching waste is often adsorbed together, and it is difficult to remove from the leakage of the mold. Some of the waste will even be adsorbed on the punch, which seriously affects the subsequent blanking. Therefore, the depth of the punch into the concave die should be increased to about 1mm, so as to ensure that the waste material is completely removed from the lower die.

Maintenance and maintenance of 6. die
When the mold is not used, it should be coated with rust oil in time, but attention should be paid to the next use of the mold, the oil should be cleaned first, and the oil sucking paper is tested until the oil is adsorbed. Otherwise, the quality of the electroplating will be affected.
When moving the mold, it should be light, stable, and slow to avoid shock and intense vibration. Two. Storage must have a fixed position, to control the humidity of the air, to avoid dust or sundries falling on the shelf, and strictly prohibit directly placed on the cement floor.

Cause and solution of metal mould pulling injury

There are two main reasons for strain during workpiece forming:

One is that the mechanical wear is formed on the surface of the workpiece and the surface of the die convex and concave die because of the macroscopic mechanical concave or uneven surface of the die convex or die surface or the inclusion of other hard particles between the forming material and the die convex surface and the die surface. The solution is to carefully grind the surface of the die convex and concave die and strengthen the production. The management of the environment.

Two is caused by the wear of the surface of the workpiece and the surface of the die convex and concave die. It is also the most common and difficult situation in production. The following detailed analysis of the formation of adhesive wear and some basic measures to reduce the adhesion wear. In order to solve the problem of strain in the forming process of mould and workpiece, the basic principle of reducing adhesive wear should be reduced, and the nature of contact pairs should be changed as the starting point.

The following three pairs of contact pairs are formed, namely, the raw material, the workpiece and the mold, and the mold.

1. through the surface treatment of raw materials, such as phosphating, spraying or other surface treatment of raw materials, forming a layer of non metal film on the surface of the formed material, it can greatly reduce or eliminate the scratch of the workpiece. This method often costs higher, and needs to add additional production equipment and increase production process. This method sometimes has some effect, but it is seldom applied in practical production.

2. adding a layer of PVC film between mold and forming material can sometimes solve the problem of workpiece pulling. For the production line, the continuous supply film can be achieved through the mechanism, and for the stamping equipment produced in the periodic production, each piece of production must be added a thin film to affect the production efficiency. The general cost of this method is very high, and a large amount of waste will be produced. It is advisable to adopt this method for the production of small large pieces of large pieces. In some occasions where the forming load is very small, sometimes the problem of pulling the workpiece can be solved by adding lubricating oil or adding EP (extreme pressure) additive lubricant.

3. by changing the die convex, die material or the surface treatment of the die convex and concave die, the formed material is changed with the convex and concave die. Practice has shown that this is an economical and effective way to solve the problem of pull injury, and is widely adopted at present.

(1) the hard alloy can be used to solve the problem of scratch of the workpiece from the die convex and die material. In general, the convex and concave die made of this material is very high in tensile resistance, and the problem is that the material cost is high and it is difficult to process. For the larger mold, it is difficult to burn the large hard alloy block. Even if firing is successful, there may be cracks in the process, and the yield is low, and some of them are almost difficult to form. In addition, the cemented carbide is brittle, and must be extremely careful in the process of handling, installation and use. In addition, because the structure of the hard alloy is composed of hard tungsten carbide particles and soft bonding phase cobalt, hard tungsten carbide particles have high wear resistance and bite resistance, while cobalt phase is low in hardness and poor in wear resistance. The cobalt phase will be worn first in the process of use, making the surface of convex and concave die uneven, so that the surface of the concave die is uneven. The surface of the workpiece will also show a tensile mark. At this time, the surface of the die and die should be polished and polished before being reproduced. The use of a suitable copper based alloy can also solve the problem of the work of the workpiece, but the hardness of the copper base alloy is low, and the wear and tear is easy to appear. In the case of mass production, the cost of the material is low. For the larger mold, such as the forming die of the automobile panel, the alloy cast iron is used in large quantities. The cast iron can only reduce the strain of the workpiece and can not eliminate the problem of drawing. However, the mould made by this way is usually short in life. After a period of time, if there is a strain, it is necessary to repair the mold and re treat the surface.

(2) it is an economical and effective way to solve the problem of scratch on the surface of the workpiece by the surface treatment of the die, especially the surface super hardening treatment of the die convex and concave die. There are many kinds of surface treatment methods, such as hard chromium plating, electroless nickel phosphorus, special alloy of brush plating and so on. Chemical heat treatment has various kinds of nitriding, boriding, sulphur and so on; surface super hardening treatment includes chemical vapor deposition (CVD), physical vapor deposition (VVD), physical and chemical vapor deposition (PvD), “ID”. Coating treatment. Electroplating, electroless plating and brush plating are different ways to form alloy coating on the surface of workpiece by electrochemical or chemical reaction. The properties of the alloy coating are different. As for wear resistance and occlusal use, hard chromium plating, electroless Ni-P plating and nickel tungsten alloy plating are widely used. These methods can sometimes achieve certain results for smaller forming load or larger die. The problem of such surface treatment is that on the one hand, the hardness of the surface hardened layer is low, and it is easy to wear. On the other hand, the coating is mechanically combined with the matrix material. In the case of large load, sometimes the coating will be flake with a few times, and the effect will be lost once the coating is peeled off. Chemical heat treatment is to heat and heat the workpiece in a medium containing some or some chemical elements. Through the physical and chemical effects of the workpiece and the medium, these or these elements are infiltrated into the surface of the workpiece, and then the appropriate square is used.

Analysis of the characteristics of hardware and QDC mould products

1. Hardware mold:
It is a combination mold, mainly stamping material is hard, or need bending process, also can design mold function according to the product. But the relative price is higher, the mold cycle is longer, the accuracy is not high, and the accuracy is at + 0.1mm.
1) blanking die:
A mold that causes a material to be separated along a closed or open contour. For example, blanking die, piercing die, cutting die, cutting die, trimming die, cutting die, etc.
2) bending die:
A die for bending or deforming a blank or other blank along a straight line (curved curve) to obtain a certain angle and shape.
3) deep drawing die:
It is a mould for making hollow blank of sheet blank, or changing the shape and dimension of hollow parts further.
4) forming die:
The blank or semi-finished workpiece is directly copied and shaped according to the convex and concave shape of the figure, while the material itself produces only partial plastic deformation. For example, bulging die, necking die, expanding die, forming die, flanging die, shaping die and so on.

Forming process of various metal materials

2018/5/25 8:42:27 Viewers:7

Material forming is an important part of the design of parts. It is also an important concern of the manufacturers. It is also a key factor in the process of material processing. Today, we take a look at the metal forming process.

casting

Liquid metal is cast into a mold cavity adapted to the shape and size of the parts. The production method of the blank or part for cooling and solidification is usually called metal forming or casting.

Process flow: liquid metal, filling, solidification, shrinkage and casting.

Process characteristics:
1, it can produce any complex parts, especially those with complicated inner cavity shape.
2, adaptability is strong, alloy type is not restricted, casting size is almost unlimited.
3, materials are widely available, waste products can be remelted and equipment investment is low.
4, high reject rate, low surface quality and poor working conditions.

Casting classification:

(1) sand mold casting (sand casting)

Sand casting: casting method for casting in sand mold. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting.

Technological process：

Sand casting process flow

Technical features:
1. It is suitable for making complex shapes, especially those with complex inner cavity.
2, wide adaptability and low cost;
3, for some poor plastic materials, such as cast iron, sand casting is the only forming process for making parts or blank.

Application: automobile engine cylinder block, cylinder head, crankshaft and other castings.

(2) molten mold casting (Investmentcasting)

Mold casting: usually refers to the mold made of the fable material, coated with several layers of refractory materials on the surface, and then melt out the mold shell to get the casting mould without the type surface, and the casting scheme can be filled after the high temperature roasting. It is often called “lost wax casting”.

Technological process：

Process flow of molten mould casting

Advantage：
1. The dimension precision and the geometric precision are high.
2. The surface roughness is high.
3. It is capable of casting complex castings, and casting alloys are not limited.

Shortcomings: the process is complicated and the cost is high

Application: it is suitable for producing small parts such as complex shape, high accuracy, or difficult to carry out other processing, such as turbine engine blades.

(3) pressure casting (die casting)

Die casting: high pressure is used to press metal liquid into a precision metal mold cavity, and metal liquid is cooled and solidified under pressure to form castings.

Technological process：

Advantage：
1. When casting, the metal liquid bears high pressure and fast flow rate.
2, the product quality is good, the size is stable, the interchangeability is good;
3. The production efficiency is high and the die casting die is used many times.
4. It is suitable for large quantities of large quantities of production, and the economic benefit is good.

Shortcomings:
1, the casting is easy to produce small pores and shrinkage.
2. Die castings are of low plasticity and are not suitable for impact loading and vibration.
3. When high melting point alloy die casting, the die life is low, which affects the expansion of die casting production.

Application: the die casting is first applied in the automobile industry and the instrument industry, and then gradually expanded to various industries, such as agricultural machinery, machine tool industry, electronic industry, national defense industry, computer, medical equipment, clocks, cameras and daily hardware and other industries.

(4) low pressure casting (low pressure casting)

Low pressure casting is a method for filling liquid metal under low pressure (0.02 ~ 0.06MPa) and crystallizing under pressure to form castings.

Technological process：

Technical features:
1, the pressure and speed of pouring can be adjusted, so it can be applied to various types of casting (such as metal type, sand mold, etc.), casting a variety of alloys and all kinds of castings of all sizes.
2. Using the bottom filling type filling, the metal liquid filling is smooth and no splash, it can avoid the involvement of gas and the scour to the wall and core, and improve the qualified rate of the castings.
3. The casting is crystallized under pressure. The structure of the casting is dense, the outline is clear, the surface is clean, and the mechanical properties are high.
4, save the riser and increase the utilization ratio of metal to 90 to 98%.
5, low labor intensity, good working conditions, simple equipment, easy to realize mechanization and automation.

Application: mainly traditional products (cylinder head, hub, cylinder rack, etc.).

(5) centrifugal casting (centrifugal casting)

Centrifugal casting is a casting method for pouring molten metal into rotating mold, filling mold with centrifugal force and solidifying.

Technological process：

Advantage：
1. There is almost no metal consumption in gating system and riser system, and the production yield is increased.
2. When producing hollow castings, the core can not be used, so the metal filling ability can be greatly improved when producing long tubular castings.
3. The casting has high density, low porosity and slag inclusion, and high mechanical properties.
4. It is easy to make the composite metal castings of cylinder and sleeve.

Shortcomings:
1, there are certain limitations in the production of special-shaped castings.
2, the diameter of the inner hole of the casting is not accurate, the surface of the inner hole is rough, the quality is poor, and the machining allowance is large.
3, specific gravity segregation is easily produced in the castings.

Application:
Centrifugal casting was first used to produce pipe casting. Centrifugal casting technology was used in metallurgy, mine, transportation, drainage and irrigation machinery, aviation, defense and automobile industry at home and abroad, and the steel, iron and non iron carbon alloy castings were produced. Especially the production of castings, such as centrifugal cast iron pipes, internal combustion engine cylinder sleeves and bushings, is most common.

(6) metal casting (gravity die casting)

Metal casting: refers to the liquid metal in gravity

Basic knowledge of hardware fasteners

Hardware buckle is a generic term for the hardware industry. It refers to various metal buckles, which involves a wide range of fields, including bags, clothing, shoe materials, leather goods, etc. such as hardware belt buckles, hardware buckles, hardware pin buckles, hardware buckles, hardware buckle, hardware D buckle, hardware buttons, hardware buttons, hardware pair buckles. Hardware round buckle and so on.
2 classification
Hardware belt buckle:
Metal belt buckle, usually made of copper, iron or zinc alloy, is divided into pin buckles, plate buckle, automatic buckle, roller buckle and other types, widely used in clothing, belt, ribbon industry, playing the role of tightness and decoration.
Hardware dog buckles:
Metal Dog buckles, zinc alloy die-casting, used in all kinds of handbags, bags, mainly used in the bag or the end of the rope, so that the belt can be conveniently fixed on the D buckle or other round buckle.
Hardware pin buckle:
Hardware pin buckle, a wide range of applications, mainly used in clothing accessories, box and bag accessories, belt, belt, gift and other fields, divided into egg type, square, round, D type, three type, Japanese typeface and so on.
Hardware D buckle:
Hardware D buckle, the material is generally divided into three kinds of copper, iron, zinc alloy, copper, iron made of D button has a fracture, unless the welding, zinc alloy has no fracture, widely used in the production of box bags. The quality assurance of parts has always been a matter of great importance to mechanical processing enterprises. But in the actual production, there are some problems in the process of stamping, and the following drawing oil manufacturers “chemical” to sum up, let everyone in the future production can be used for reference.

1. The twisting of the metal stamping parts
Stamping parts in progressive die, by punching cut around the expected method to form stamping parts. The overturn of stamping parts is mainly due to the tensile strength of the material on the die surface. Therefore, the stamping and stretching oil factory “chemical” proposal when pressing, pressing and compressing material is the key to prevent the stamping material from turning and twisting. Causes and Countermeasures of stamping and twisting during stamping.
The stamping and distortion of punching parts resulted in poor forming after bending, which needs to be solved from blanking blanking station. This is mainly due to the fact that the stamping parts are not stable enough, so the way to solve the problem is to guide the guide position and bend in the bending process before bending, and to press the material to prevent the sliding movement of the stamping parts from bending in the bending process.

Two. The tearing of the metal stamping parts
According to the actual production situation, through the inspection of the tear part, the fracture shape and the degree of extrusion, the “chemical” of the punching and drawing oil manufacturer is found to cause the tear and the skew to be mainly reflected in the flanging forming process. Therefore, this process needs to be paid attention to, so the main reasons for this process are as follows:
1. The forming process parameters are not in place
In the forming process of the workpiece, the process requires that the die, the material core and the two must be closely combined, and the plastic deformation of the sheet is formed when the slide block of the machine is slid. However, in the process of pressing, the quality of the parts is unstable, the main reason is that the processing technicians have not adjusted the pressure of the machine tools at this stage, resulting in the problems of stability and the instability of the quality of the parts.
2. Defects in the design of flanged forming die
The mold for the first mock exam double cavity, because this process in addition to the content of flanging, with shape, with special complex curved surface parts, narrow, forming requirements of die material core and forming surface character, resulting in the mold structure forming conditions to form large, small volume of binder. The “chemical” of the punching and drawing oil manufacturer thinks that this is mainly due to the fact that when the personnel are involved in the original mold design, only the small pressure surface is considered to be small, and the forming of the core forming is ignored.

Three. Measures for improvement
1. Select suitable high quality stamping oil
In stamping and drawing processing, stamping and drawing oil is a necessary auxiliary product. Through the analysis of the well-known stamping and drawing oil factory chemical industry, it is found that the factors that affect the rate of stamping and drawing are roughly the precision of the stamping equipment, the level of the operator, the performance of the material, the rationality of the mold design, the condition of the stamping die and the quality of the stamping die. The factors that affect the yield of stamping and drawing are very complicated, and stamping and drawing oil is also one of the important factors that affect the success or failure. The special purpose of stamping stretch oil is very strong, and the application scope is narrow. Therefore, when selecting the stamping stretch oil, we must carefully investigate the following aspects. Stamping and drawing process: blanking, drawing, drawing thinning and bending. The material of the workpiece is aluminum, copper, alloy and silicon steel sheet. (3) deep drawing coefficient and deep drawing times. 4. The tonnage and working speed of the punching drawing machine, and the shape of the workpiece.

Key points for the installation of bathrooms

The hinge of bathroom hinge is exquisite. 6 important points to note are:

(1) before the installation of the bathroom hinge, check whether the hinge and window frames and fans match.

(2) check whether the hinge and the hinge are high, wide and thick.

(3) bathroom hinge installation should check hinge and its connection screws, fasteners are supporting.

(4) the connection of hinges should be matched with the material of the frame and fan, such as the hinges used in the steel frame and wooden doors, welding on the side of the steel frame, and the wooden screw attached to the side of the door fan.

(5) when the two sheets of the page are asymmetrical, it should be identified which one should be connected with the fan, which should be connected with the door and window frame, and one side attached to the three section of the axis should be fixed with the frame, and one side attached to the two section of the axis should be fixed with the frame.

(6) when the bathroom hinge is installed, the hinge shaft on the same fan should be kept on the same plumb line, so as to prevent the doors and windows from projectile.

Which material is good for bathroom hooks, stainless steel hooks and brass hooks?

1, copper copper hook electroplating chromium color, if it is enough, it is longer than stainless steel hook durable and bright, appear noble, but the price is not very expensive, generally in the 250~1200 yuan. But many manufacturers are electroplating decorative chromium, so the product has the possibility of coating desalting, plus the coating is not enough thick sealing enough, will make copper volatile copper green, if you want to choose copper must choose the well-known manufacturer’s products.
2, stainless steel hook also has defects, if it is to use 201.202 of the material production is easy to rust, but the price is cheap 30~60 yuan, if the use of 304 to do a lot of effect, if good polishing and electrolytic treatment, and then durable and beautiful, price between 60~200 yuan (because of the problem of thick and thin material). There are A3 products re plating products 3 years after all rust, and space aluminum is also easy to grow powder, and hardness is not enough, so you have to choose good, see the material. Choose the product to see your own needs, if you want to have a grade, durable, or choose 304 stainless steel, although the price is more expensive, but if you pay attention to maintenance, you can use more than ten years of stainless steel bathroom hook and copper bathroom hook comparison.
Advantages of stainless steel hooks

1, the bathroom hook made of stainless steel has a great advantage in beauty, luxury, hygiene, environmental protection, durability, price and other aspects relative to the copper bathroom hook.
2, it is good for beauty. The best way to deal with the surface of copper products is nickel and chromium plating. The quality of electroplating layer is faster than that of the electroplating coating, and the speed is less than 10. Stainless steel kitchenware and tableware are popular all over the world. Because the polished stainless steel products always keep the white luster, never rust, use 10 years, 20 years, 30 years as long as you use clean water on the liniment, it is clean and bright, bright as new.
3, it is beneficial to the health, health and environmental protection of the human body. Copper products will lead to varying degrees and grow copper rust. The stainless steel hook products are acid resistant and alkali resistant, and are free from harmful substances.
4. Durable. The hardness of stainless steel is more than 2 times higher than that of copper. Never rust, never corrode, never deform.
5, the price, cheaper than copper products, stainless steel than copper price, surface treatment without electroplating directly polishing, saving electricity and plating fee, but the hardness of stainless steel is more difficult than copper, low speed, low efficiency, high labor cost. Therefore, there are individual styles which are not suitable for processing, and may not be cheaper than copper.

How to clean the oil stains and oil stains on the surface of the workpiece?

submission
The cleaning of oil pollution on the metal surface has been a major problem in the manufacturing industry. Because of improper maintenance of metal equipment, many factories disrupt production operations and affect the performance and profit of the enterprises. A large part of the reason is that enterprises do not understand the maintenance of metal equipment, and do not know how to carry out proper cleaning and maintenance. Then, what is the cleaning method of metal surface oil stain?
Undefined

ultrasonic cleaning
As the ultrasonic wave is added, the solvent produces shock and accelerates the dissolution or disengagement of the surface. The oil efficiency is high, the quality is better than the pure solvent and chemical deoiling method, but the cost is high.
Ultrasonic wave is added to immersion or electrochemical deoiling device.
It is suitable for parts that are difficult to remove oil, especially those with complicated shapes.
Two
soak cleaning
1, fast speed, can quickly dissolve two types of grease, do not corrode the workpiece, remove the oil is not thorough; solvent toxic, flammable, high cost.
2, the use of acid and alkali chemical medium costs low, simple equipment, but soak time longer, low efficiency.
Three

Surface active agent deoiling
At room temperature operation, energy saving and good oil removal effect, some surfactants are more expensive, and the cost of removing oil is higher. There are many kinds of surfactants and their properties are different.
Use various degreasing cleaners such as detergent, washing spirit and liquid soap.
It is suitable for removing oil from various workpieces. The key is to select the kinds of surfactants.
If you want to purchase ultrasonic cleaning agent, you may consider the Yu man industry. Interested partners can leave a message under the article. There are three samples of free samples per day. Take action on the heart.
Four

YYu full environmental cleaning agent
If you want to know more about environmental protection industrial detergent, please pay attention to me. Xiaobian will give you the relevant knowledge of environmental protection industrial cleaning every day. Of course, if you have any questions, please leave a comment! The little editor will reply in time.

What are all the hardware accessories?

Furniture hardware accessories
Wood screw, hinge, pull hand, slide Road, partition pin, hanger, nail, head machine, tooth rubbing machine, multi position machine, hardware foot, hardware frame, hardware hand, turntable, zipper, pneumatic rod, spring, furniture machinery and so on.
Cabinet hardware accessories
Hinges, drawers, guideways, steel drawing, drawing baskets, hangers, flume, pulling basket, lamp, kicking board, knife and fork disc, hanger hanger, multi-function column, cabinet body assembler, etc.
Mold hardware accessories
Punching needle, punch, guide string, guide sleeve, head pin, head pin, tube, ball sleeve, ball sleeve, cage, external guide column, independent guide column, self lubricating plate, self lubricating guide sleeve, no oil guide sleeve, no oil slide plate, outer guide column and so on.
Marine hardware fittings
Shackles, flower orchids, card heads, swivel rings, rings, pulleys, cable bolts, pipe seats, cable guides, ship posts and so on.
Clothing hardware accessories
Buttons, thread buckle, hook, claw nail, rope buckle, pin buckle, army buckle, zipper head, five claw knob, fashion button, bundle ring, diurnal buckle, glue buckle, stone fastener, latch head, belt buckle, hollow nail, alloy pair buckle, alloy pull card, sign and so on.
Box and bag hardware accessories
Rivets, aluminum strips, chains, steel rings, buttons, square rings, four buckles, mushroom studs, hollow nails, wire rings, backpack shelves, triangular rings, five corners, three rivets, bags and bags, dog buckles, pull cards, signs and so on.
Belt hardware accessories
Belt buckle, belt buckle, alloy belt buckle, belt buckle, belt buckle, etc.